Contacts of the helix formed by residues 140 - 167 (chain A) in PDB entry 3URZ


Residue contacts within the protein are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332). A short description of the analytical approach is given at the end of the page.
For CSU analysis of other PDB entry

Note:
Non-standard 3 letter residue codes indicate a heterogroup. To identify and analyse, use LPC software

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with ASN 140 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107A  VAL*     4.0    15.4    -      -       -      +
    108A  ASP*     5.2     2.2    +      -       -      -
    111A  GLU*     4.8     3.3    +      -       -      +
    133A  ILE*     3.2    26.3    -      -       +      +
    134A  LEU*     4.7     0.9    -      -       +      -
    137A  GLU*     3.1    44.3    +      -       +      +
    138A  ALA      3.4     3.6    +      -       -      -
    139A  ASP*     1.3    72.4    -      -       -      +
    141A  LEU*     1.3    65.0    +      -       -      +
    142A  ALA*     3.6    11.6    +      -       -      +
    143A  ALA*     3.2    26.7    +      -       +      -
    144A  ASN*     2.7    30.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 141 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    139A  ASP      3.2     7.2    +      -       -      +
    140A  ASN*     1.3    76.1    -      -       -      +
    142A  ALA*     1.3    64.2    +      -       -      +
    144A  ASN*     3.9     3.1    -      -       -      +
    145A  ILE*     3.1    40.2    +      -       +      +
    201A  LYS      4.7     3.8    -      -       -      +
    202A  VAL*     3.7    43.3    -      -       +      +
    206A  PHE*     4.1    31.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 142 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111A  GLU*     3.2    44.2    -      -       +      +
    115A  GLU*     5.7     0.4    -      -       -      +
    130A  TYR*     4.5     4.8    -      -       +      -
    133A  ILE*     5.9     0.2    -      -       +      -
    140A  ASN*     3.5     8.5    +      -       -      +
    141A  LEU*     1.3    78.3    -      -       -      +
    143A  ALA*     1.3    62.9    +      -       -      +
    145A  ILE*     3.4    11.0    +      -       -      +
    146A  PHE*     3.3    21.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 143 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130A  TYR*     3.7    30.0    -      -       +      +
    133A  ILE*     3.7    26.0    -      -       +      +
    134A  LEU*     3.7    21.8    -      -       +      -
    140A  ASN*     3.2     6.0    +      -       +      +
    142A  ALA*     1.3    77.7    -      -       -      +
    144A  ASN*     1.3    58.1    +      -       -      +
    146A  PHE*     3.5     1.6    +      -       -      +
    147A  LEU*     3.1    35.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 144 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134A  LEU*     3.2    19.1    -      -       -      +
    138A  ALA      3.2    22.0    +      -       -      +
    139A  ASP*     3.4    11.1    -      -       -      +
    140A  ASN      2.7    23.6    +      -       -      +
    141A  LEU*     4.0     2.0    -      -       -      +
    143A  ALA*     1.3    74.4    -      -       -      +
    145A  ILE*     1.3    62.8    +      -       -      +
    147A  LEU*     4.9     0.2    -      -       -      -
    148A  GLY*     3.1    18.4    +      -       -      -
    198A  SER*     3.3    44.0    +      -       -      +
    199A  LEU*     4.9     0.3    -      -       -      +
    201A  LYS*     3.9    17.3    +      -       +      +
    202A  VAL*     3.8    13.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 145 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141A  LEU*     3.1    42.1    +      -       +      +
    142A  ALA*     3.7     8.3    -      -       -      +
    143A  ALA      3.3     0.4    -      -       -      -
    144A  ASN*     1.3    75.5    -      -       -      +
    146A  PHE*     1.3    65.9    +      -       -      +
    148A  GLY*     4.0     0.3    -      -       -      -
    149A  ASN*     3.2    44.2    +      -       -      +
    199A  LEU*     5.1     2.8    -      -       +      +
    202A  VAL*     3.8    26.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 146 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118A  VAL*     3.7    40.4    -      -       +      -
    123A  GLU*     6.5     0.4    -      -       +      -
    126A  ALA*     5.5     0.7    -      -       +      -
    127A  LEU*     4.7     8.5    -      -       +      -
    130A  TYR*     3.4    48.5    -      +       +      +
    142A  ALA      3.3     8.3    +      -       -      +
    143A  ALA      3.9     5.4    -      -       -      +
    145A  ILE*     1.3    82.7    -      -       -      +
    147A  LEU*     1.3    71.3    +      -       +      +
    149A  ASN*     3.4     5.0    +      -       -      +
    150A  TYR*     2.8    54.6    +      +       +      +
----------------------------------------------------------
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Residues in contact with LEU 147 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    127A  LEU*     3.6    33.4    -      -       +      +
    130A  TYR*     4.1    25.1    -      -       +      +
    131A  GLU*     4.5     5.2    -      -       +      +
    134A  LEU*     3.3    35.2    -      -       +      -
    143A  ALA      3.1    17.7    +      -       -      +
    146A  PHE*     1.3    87.1    -      -       +      +
    148A  GLY*     1.3    59.7    +      -       -      +
    150A  TYR*     3.9     3.4    -      -       +      -
    151A  TYR*     2.9    59.7    +      -       +      +
    198A  SER*     4.2     9.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 148 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144A  ASN      3.1    20.0    +      -       -      -
    145A  ILE      4.0     0.7    -      -       -      -
    147A  LEU*     1.3    75.5    -      -       -      +
    149A  ASN*     1.3    63.4    +      -       -      +
    152A  TYR*     3.4    23.2    +      -       -      +
    195A  ALA*     3.5    27.2    -      -       -      +
    198A  SER*     3.7     6.1    -      -       -      -
    199A  LEU*     3.9    12.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 149 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145A  ILE*     3.2    33.4    +      -       -      +
    146A  PHE*     3.8     4.4    -      -       -      +
    148A  GLY*     1.3    76.0    -      -       -      +
    150A  TYR*     1.3    59.4    +      -       -      +
    151A  TYR      3.5     0.2    -      -       -      -
    152A  TYR*     4.0     5.6    -      -       -      +
    153A  LEU*     3.0    45.7    +      -       +      +
    199A  LEU*     4.0    14.4    -      -       -      +
    210A  GLU*     5.6    11.8    +      -       -      +
    214A  THR*     5.0     7.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 150 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123A  GLU*     3.1    39.7    +      -       +      +
    127A  LEU*     3.6    37.4    -      -       +      +
    146A  PHE*     2.8    43.4    +      +       +      +
    147A  LEU*     3.2     8.7    +      -       -      +
    149A  ASN*     1.3    76.0    -      -       -      +
    151A  TYR*     1.3    77.3    +      +       -      +
    153A  LEU*     4.1     3.2    -      -       -      +
    154A  THR*     2.7    55.8    +      -       +      +
    191A  ARG*     4.3    11.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 151 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    127A  LEU*     4.5    14.6    -      -       +      +
    131A  GLU*     5.5     6.4    +      -       -      -
    147A  LEU*     2.9    51.1    +      -       +      +
    150A  TYR*     1.3    90.1    -      +       -      +
    152A  TYR*     1.3    59.1    +      -       -      +
    154A  THR*     3.2     3.2    +      -       -      -
    155A  ALA*     2.9    33.1    +      -       -      +
    191A  ARG*     3.4    51.5    -      -       +      +
    194A  LYS*     3.9    42.1    +      -       +      +
    195A  ALA*     3.8     9.6    -      -       +      +
    198A  SER*     5.6     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 152 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    148A  GLY      3.4    19.7    +      -       -      +
    149A  ASN*     4.0     5.8    -      -       -      +
    150A  TYR      3.4     0.4    -      -       -      -
    151A  TYR*     1.3    77.9    -      -       -      +
    153A  LEU*     1.3    75.0    -      -       +      +
    155A  ALA*     3.9     3.9    -      -       -      +
    156A  GLU*     3.1    47.1    +      -       +      +
    192A  TYR*     3.8    21.4    +      +       -      -
    195A  ALA*     3.6     9.5    -      -       +      +
    214A  THR*     3.7    24.7    -      -       +      -
    217A  LYS*     3.2    47.5    +      -       +      +
    218A  ILE*     3.7    29.2    -      -       +      -
    221A  ILE*     4.8     3.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 153 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149A  ASN*     3.0    30.0    +      -       +      +
    150A  TYR*     4.2     3.6    -      -       -      +
    152A  TYR*     1.3    90.2    -      -       +      +
    154A  THR*     1.3    65.0    +      -       +      +
    156A  GLU*     3.4    10.1    +      -       +      +
    157A  GLN*     3.4    23.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 154 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123A  GLU*     5.1     3.4    -      -       -      +
    150A  TYR*     2.7    50.4    +      -       +      +
    151A  TYR*     3.2     8.5    +      -       -      -
    153A  LEU*     1.3    76.7    -      -       +      +
    155A  ALA*     1.3    58.2    +      -       -      +
    157A  GLN*     3.2    37.2    +      -       -      +
    158A  GLU*     3.3    17.2    -      -       -      +
    191A  ARG*     2.9    30.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 155 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151A  TYR      2.9    20.6    +      -       -      +
    152A  TYR      3.9     2.0    -      -       -      +
    154A  THR*     1.3    74.5    +      -       -      +
    156A  GLU*     1.3    60.1    +      -       -      +
    157A  GLN      3.4     0.2    -      -       -      -
    158A  GLU*     3.5     1.5    +      -       -      -
    159A  LYS*     3.0    28.8    +      -       -      +
    187A  LEU*     3.4    18.6    -      -       +      +
    191A  ARG*     3.4    17.5    -      -       +      +
    192A  TYR*     3.4    32.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 156 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    152A  TYR*     3.1    37.5    +      -       +      +
    153A  LEU*     3.5    13.0    -      -       +      +
    154A  THR      3.3     0.2    -      -       -      -
    155A  ALA*     1.3    77.4    -      -       -      +
    157A  GLN*     1.3    60.2    +      -       -      +
    159A  LYS*     3.3    12.1    +      -       -      +
    160A  LYS*     3.2    21.1    +      -       -      +
    192A  TYR*     2.9    23.6    +      -       -      -
    221A  ILE*     3.7    14.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 157 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    153A  LEU      3.4     8.9    +      -       -      +
    154A  THR*     3.2    41.0    +      -       -      +
    156A  GLU*     1.3    74.9    -      -       -      +
    158A  GLU*     1.3    63.6    +      -       +      +
    160A  LYS*     3.4     9.4    +      -       -      +
    161A  LYS*     3.1    26.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 158 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    154A  THR*     3.3    18.5    +      -       -      +
    155A  ALA      3.8     4.7    -      -       -      +
    156A  GLU      3.4     0.4    -      -       -      -
    157A  GLN*     1.3    79.2    -      -       +      +
    159A  LYS*     1.3    60.2    +      -       -      +
    161A  LYS*     3.5    21.5    +      -       -      +
    162A  LEU*     3.1    28.6    +      -       -      +
    187A  LEU*     3.9    27.4    -      -       +      -
    191A  ARG*     5.0     6.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 159 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    155A  ALA      3.0    17.5    +      -       -      +
    156A  GLU*     3.5    14.2    +      -       -      +
    157A  GLN      3.3     0.2    -      -       -      -
    158A  GLU*     1.3    76.3    -      -       -      +
    160A  LYS*     1.3    61.0    +      -       -      +
    162A  LEU*     3.6     8.0    +      -       -      +
    163A  GLU*     2.8    53.2    +      -       -      +
    184A  LEU*     4.0    20.6    -      -       +      -
    187A  LEU*     5.0     5.3    -      -       +      +
    192A  TYR*     3.5    22.4    -      -       +      +
    221A  ILE*     3.6    34.3    -      -       +      +
    224A  GLU*     4.8    11.3    +      -       -      -
    225A  VAL*     5.3     3.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 160 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    156A  GLU      3.2    13.2    +      -       -      +
    157A  GLN*     3.7    11.9    -      -       -      +
    158A  GLU      3.3     0.2    -      -       -      -
    159A  LYS*     1.3    74.2    -      -       -      +
    161A  LYS*     1.3    55.9    +      -       -      +
    163A  GLU*     3.4     9.7    +      -       -      +
    164A  THR*     2.7    45.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 161 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    157A  GLN      3.1    16.1    +      -       -      +
    158A  GLU*     3.7    23.1    -      -       -      +
    159A  LYS      3.4     0.2    -      -       -      -
    160A  LYS*     1.3    75.4    -      -       -      +
    162A  LEU*     1.3    62.0    +      -       -      +
    164A  THR*     3.9     5.2    -      -       -      -
    165A  ASP*     3.0    49.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 162 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158A  GLU      3.1    18.4    +      -       -      +
    159A  LYS*     3.7     6.5    -      -       -      +
    161A  LYS*     1.3    78.7    -      -       -      +
    163A  GLU*     1.3    59.5    +      -       -      +
    165A  ASP*     3.8     6.3    +      -       +      +
    166A  TYR*     3.6    13.3    +      -       -      +
    179A  ARG      4.6     2.0    -      -       -      +
    180A  TYR*     3.5    42.0    -      -       +      +
    183A  GLY*     3.4    14.4    -      -       -      +
    184A  LEU*     3.2    48.9    -      -       +      +
    187A  LEU*     5.7     2.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 163 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    159A  LYS*     2.8    53.2    +      -       +      +
    160A  LYS*     3.4     7.9    +      -       -      +
    162A  LEU*     1.3    75.1    -      -       -      +
    164A  THR*     1.3    60.3    +      -       -      +
    167A  LYS*     3.0    57.8    +      -       -      +
    180A  TYR*     3.6    32.1    +      -       +      +
    184A  LEU*     4.6     4.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 164 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    160A  LYS*     2.7    33.5    +      -       -      +
    161A  LYS*     3.9     7.1    -      -       -      -
    162A  LEU      3.5     0.2    -      -       -      -
    163A  GLU*     1.3    76.8    -      -       -      +
    165A  ASP*     1.3    64.9    +      -       -      +
    167A  LYS*     4.0    14.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 165 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    161A  LYS*     3.0    40.9    +      -       -      +
    162A  LEU*     4.0     7.1    -      -       +      +
    163A  GLU      3.3     0.2    -      -       -      -
    164A  THR*     1.3    82.2    -      -       -      +
    166A  TYR*     1.3    62.8    +      -       -      +
    167A  LYS      4.8     0.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 166 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    162A  LEU      3.6     5.3    +      -       -      +
    163A  GLU      4.2     1.8    -      -       -      +
    164A  THR      3.5     0.2    -      -       -      -
    165A  ASP*     1.3    80.1    -      -       -      +
    167A  LYS*     1.3    67.6    +      -       +      +
    172A  PRO*     4.8    14.7    -      -       +      +
    176A  GLN      5.6     2.0    -      -       -      +
    177A  TYR*     6.2     1.8    -      -       +      -
    180A  TYR*     3.8    42.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 167 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    163A  GLU*     3.0    45.7    +      -       -      +
    164A  THR*     4.0    16.2    -      -       -      +
    165A  ASP      4.8     0.9    -      -       -      -
    166A  TYR*     1.3    83.1    -      -       +      +
    180A  TYR*     5.2     8.7    -      -       +      +
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il